Warmerly
No monthly send meter on paid plans; Free is capped at 100 sends a month. Active prospects: 5,000 on Starter
Warmerly
Mailshake
One-to-one · Sends and contacts
Sends and contacts
One row, in depth: what each tool does, the verified numbers, and who each suits.
Mailshake details read from its pricing page, home page, feature pages and help centre on 21 October 2026.
Warmerly
No monthly send meter on paid plans; Free is capped at 100 sends a month. Active prospects: 5,000 on Starter
Mailshake
Starter allows 1,500 sends a month; unlimited sends from Email Outreach; unlimited uploaded contacts on all three plans
The short answer
Sends and contacts, in one look.
Warmerly does not meter sends on paid plans, but it caps active prospects: 5,000 on Starter, 50,000 on Growth and 250,000 on Agency. Mailshake caps sends on Starter at 1,500 a month, then lists unlimited sends from $49 and unlimited uploaded contacts on every plan. Mailshake is ahead on contact volume. On Starter, Warmerly is ahead on sends. Last checked 22 October 2026.
Mailshake
Starter allows 1,500 sends a month; unlimited sends from Email Outreach; unlimited uploaded contacts on all three plans
The picture
Drawn side by side.
What each side limits
Warmerly limits active prospects. Mailshake limits sends on Starter only.
WarmerlyMailshake
- Warmerly Starter, active prospectsNo monthly send meter
- Warmerly Growth, active prospectsNo monthly send meter
- Mailshake Starter, sends a monthUnlimited from Email Outreach
- Mailshake, uploaded contactsOn all three listed plans
Bars show relative size within each side, not the same unit. Warmerly counts people in campaigns, Mailshake counts emails on Starter.
| Item | Value |
|---|---|
| Warmerly Starter, active prospects | 5,000. No monthly send meter |
| Warmerly Growth, active prospects | 50,000. No monthly send meter |
| Mailshake Starter, sends a month | 1,500. Unlimited from Email Outreach |
| Mailshake, uploaded contacts | Unlimited. On all three listed plans |
On screen
What it looks like.
WarmerlySample data
How Warmerly does it
Warmerly, in detail.
Sending is bounded by your mailboxes, their daily limits, a ramp for new mailboxes and send-window rules, and contacts by the number of active prospects and leads per campaign.
01
No send meter on paid plans
Starter, Growth and Agency have no monthly send quota. Free allows 100 campaign sends a month. On this page no cap on sends means no meter, not unlimited volume.
Warmerly product, checked 21 October 2026
02
Daily limits per mailbox
Each mailbox has its own daily campaign limit, 30 by default, which can be raised up to 1,000 through the account settings API. A new campaign also has a daily limit of 30 until you raise it.
Warmerly product, checked 21 October 2026
03
Active prospects are capped
Active prospects are the distinct email addresses across active and paused campaigns: 500 on Free, 5,000 on Starter, 50,000 on Growth and 250,000 on Agency. One campaign can hold 2,500 leads on Starter, 25,000 on Growth and 100,000 on Agency.
Warmerly product, checked 21 October 2026
04
Where Warmerly is behind
A hard ceiling on contacts exists on every Warmerly plan, and Mailshake lists none on uploaded contacts.
Warmerly product, checked 21 October 2026
05
Defaults that set real volume
The campaign's minimum wait between sends is 10 minutes by default and its hours default to 09:00 to 17:00, Monday to Friday. An 8-hour window with a 10-minute gap is about 48 sends a mailbox a day, so the 30-a-day default is reached before the gap runs out.
Warmerly product, checked 21 October 2026
06
A ramp for new mailboxes
The ramp starts at 3 sends per mailbox on day 1, adds 1 per sending day and stops at 15, so full volume arrives on the 13th sending day. It is on by default for projects with no mailbox or a mailbox under 14 days of warm-up.
Warmerly product, checked 21 October 2026
07
Campaign daily limit range
The campaign's own daily limit is 30 by default and accepts 1 to 50,000. It is a ceiling shared across the campaign's mailboxes, and each mailbox's own limit still applies underneath it.
Warmerly product, checked 21 October 2026
08
Recipient-local hours
Sends can be held to 08:00 to 17:00 in the lead's own timezone, when the lead's country is known. Leads without a country, which is most CSV imports, fall back to your sending window.
Warmerly product, checked 21 October 2026
09
Other limits on a plan
Starter allows 5 active campaigns, Growth 25, and Agency has no cap on active campaigns. Free allows 1 campaign and 500 leads in it.
Warmerly product, checked 21 October 2026
How Mailshake does it
Mailshake, in detail.
Sends are capped on Starter and unlimited above it. Uploaded contacts and campaigns are unlimited on all three listed plans, with a calendar of sending rules and fixed provider caps.
01
Sends by plan
Starter lists 1,500 email sends per month. Email Outreach and Sales Engagement list unlimited email sends per month.
mailshake.com/pricing · read 21 October 2026
02
Unlimited uploaded contacts
All three plans list unlimited uploaded contacts and unlimited campaigns per month.
mailshake.com/pricing · read 21 October 2026
03
Provider daily caps
A help article, updated 13 May 2021, says Mailshake limits sending to 500 emails a day on Gmail, 2,000 on G Suite, 1,000 on Microsoft and 1,000 over SMTP, and that a campaign can hold up to 5,000 prospects.
docs.mailshake.com/article/57-how-many-emails-can-i-send-per-day · read 21 October 2026
04
A sending calendar
Admins can set days, a time window, at least 5 minutes between batches, a maximum per day and a minimum and maximum per time slot.
docs.mailshake.com/article/140-how-can-i-tweak-sending-schedules · read 21 October 2026
05
A calendar you can edit
Admins choose sending days and a time window, a strategy of spacing sends out or sending as fast as possible, a maximum per day, at least 5 minutes between batches, and a minimum and maximum per time slot.
docs.mailshake.com/article/140-how-can-i-tweak-sending-schedules · read 22 October 2026
06
Sending rules per address or per campaign
Calendar rules can be set for each email address when one address sends a campaign, or on the campaign when several addresses share it. Changes update active campaigns automatically.
docs.mailshake.com/article/140-how-can-i-tweak-sending-schedules · read 22 October 2026
07
A warm-up cadence for volume
The help article says not to jump from 20 emails a day to 300, and suggests raising the maximum per slot by one each week: 1 at a time in week 1, 2 in week 2, 3 in week 3.
docs.mailshake.com/article/140-how-can-i-tweak-sending-schedules · read 22 October 2026
08
Automatic pause on a provider quota
If Mailshake detects that a provider quota was reached it pauses sending for a period and resumes later. The article says this notice often arrives after the quota is already exceeded, so you should limit volume yourself.
docs.mailshake.com/article/57-how-many-emails-can-i-send-per-day · read 22 October 2026
09
Alias and provider throttling
The article warns that a provider may throttle an account far below its daily limit, and that an alias is subject to the limits of the service behind the alias domain.
docs.mailshake.com/article/57-how-many-emails-can-i-send-per-day · read 22 October 2026
What Mailshake does not say
We looked, and found no statement on these. That is about its published pages only, not about the product.
- A per-day cap on the current plans beyond the help article's provider figures
- Whether the 5,000 prospects per campaign still applies
- A statement of Mailshake's current per-address daily cap on each plan
- Sending within the recipient's own timezone
- Whether the unlimited sends on paid plans have a fair-use limit
Where the sources disagree
We report each version rather than pick one.
- Mailshake's help article on daily limits is dated 13 May 2021, so its provider figures may have changed.
- Mailshake's pricing page lists unlimited uploaded contacts, while a 2021 help article says a campaign has a prospect limit of 5,000, which may mean unlimited campaigns rather than a bigger list.
The numbers
Only what we could verify.
| Measure | Warmerly | Mailshake |
|---|---|---|
| Sends and contacts | No monthly send meter on paid plans; Free is capped at 100 sends a month. Active prospects: 5,000 on Starter | Starter allows 1,500 sends a month; unlimited sends from Email Outreach; unlimited uploaded contacts on all three plans |
| Sends on the entry plan | No monthly meter on Starter | 1,500 a month on Starter |
| Sends on higher plans | No monthly meter | Unlimited from Email Outreach |
| Contacts | 5,000 active prospects on Starter | Unlimited uploaded contacts |
| Daily limit per mailbox | 30 by default, up to 1,000 | Gmail 500, G Suite 2,000, Microsoft 1,000, SMTP 1,000 (2021 article) |
| Campaigns on the entry plan | 5 active campaigns on Starter | Unlimited per month on Starter |
| Leads in one campaign | 2,500 Starter, 25,000 Growth, 100,000 Agency | 5,000 per the 2021 help article |
| Minimum gap between sends | 10 minutes by default | At least 5 minutes, you set it |
| Ramp for new mailboxes | 3 a day rising by 1 to 15 | Advice to add 1 per slot each week |
In practice
What it means for you.
Our reading of the facts above. Not a promise, and not the only reasonable reading.
Count prospects, not just sends
If you hold more than 5,000 active prospects on Starter, Warmerly's plan limit is the one you will reach. If you send more than 1,500 emails a month on Mailshake Starter, its send cap is.
Both are bounded by mailboxes in the end
A daily limit per mailbox and provider quotas bound real volume on both tools, whatever the plan says.
What 1,500 sends means
On Mailshake Starter, 1,500 sends a month is 75 a day over 20 sending days. A single Gmail address is capped at 500 a day by its help article, so 1,500 sends would take 3 days at that cap. At $49 the send cap goes away and the address cap and your own calendar are what remain.
Five Warmerly mailboxes at the defaults
At 30 a day each, 5 mailboxes send up to 150 a day, which is 3,000 over a 20-weekday month, with no monthly send meter on Starter. During the ramp each mailbox sends 3, 4, 5 and so on up to 15, which adds up to 117 sends per mailbox over the first 13 sending days.
A list of 12,000 prospects
On Warmerly, 12,000 active prospects exceeds Starter's 5,000 and a single Starter campaign's 2,500 leads, so it needs Growth, which allows 50,000 active and 25,000 in a campaign. Mailshake lists unlimited uploaded contacts, though its 2021 article says a campaign holds up to 5,000 prospects, so the list would be split across at least 3 campaigns if that still applies.
Spacing sends across a working day
With 5 minutes between batches over an 8-hour window, Mailshake has 480 / 5 = 96 slots a day, and the minimum and maximum per slot set how many emails go in each. Warmerly's default 10-minute gap gives about 48 per mailbox.
Who it suits
Pick the one that fits.
Warmerly
Warmerly is the better fit if
- You want no send meter on a $19 plan with 5 mailboxes
- Your active prospect list fits within 5,000 on Starter or 50,000 on Growth
- You want the first 13 sending days of a new mailbox ramped for you by default
- You want sends held to the recipient's own working hours
- You prefer a per-mailbox daily limit you set rather than fixed provider caps
Mailshake
Mailshake is the better fit if
- You want unlimited uploaded contacts on every plan
- You send high volume from one or two addresses and want unlimited sends at $49
- You want a sending calendar with a minimum gap of 5 minutes and per-slot minimum and maximum
- You have lists above 50,000 prospects and do not want a contact cap
Questions
Does Mailshake limit sends?
Its Starter plan lists 1,500 email sends a month. Email Outreach and Sales Engagement list unlimited sends. Provider limits such as Gmail's 500 a day still apply, per a help article dated 2021.
Does Warmerly limit sends?
Paid plans have no monthly send meter. Free is capped at 100 campaign sends a month. Each mailbox has a daily limit, 30 by default.
Does Mailshake limit how many contacts I can upload?
Its pricing page lists unlimited uploaded contacts on Starter, Email Outreach and Sales Engagement. A 2021 help article says one campaign holds up to 5,000 prospects.
How many leads can a Warmerly campaign hold?
2,500 on Starter, 25,000 on Growth and 100,000 on Agency. Active prospects across all campaigns are capped at 5,000, 50,000 and 250,000.
Can I stop Mailshake sending at weekends?
Yes. Its sending calendar lets an admin choose the days of the week. Warmerly's default is Monday to Friday and it can be changed.
Sources
- Mailshake pricing page and its FAQ
- Mailshake help: emails per day (updated 13 May 2021)
- Mailshake help: sending calendar rules
Mailshake pages were read on 21 October 2026. Plans and wording change, so check the vendor's own page before you decide. Warmerly details come from the product as it runs today.
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